Design of distance measuring and reversing system

The main work of this paper is to design and implement a set of ultrasonic ranging system which uses STC89C51 single chip microcomputer as the main control chip, uses ultrasonic ranging sensor HC - SR04 as the ranging method, and uses DS18B20 temperature sensor to correct the sound speed in the current measuring environment, displays and alarms the ranging result with LCD12864 liquid crystal display and buzzer, and supports the function of modifying the alarm distance.